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Question

An electromagnet is based on which of the following effects of electric current?

A
Chemical effect
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B
Magnetic effect
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C
Heating effect
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D
Charging effect
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Solution

The correct option is B Magnetic effect
An electromagnet is a piece of metal at the core with wire wound over it. When the current flows through the wire, the metal acts like a magnet. It is based on the magnetic effect of electric current. The metal is magnetized by the current.

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